--- a/flys-artifacts/ChangeLog	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/ChangeLog	Thu Mar 15 10:30:03 2012 +0000
@@ -1,3 +1,27 @@
+2012-03-15  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/exports/ChartHelper.java: Added a new
+	  method that returns the Bounds for a given XYDataset. Based on the
+	  concrete type of the XYDataset, the call is dispatched to a more specific
+	  method.
+
+	* src/main/java/de/intevation/flys/exports/TimeseriesChartGenerator.java:
+	  Removed the whole "range" stuff and some methods that are implemented in
+	  upper classes.
+
+	* src/main/java/de/intevation/flys/exports/ChartGenerator.java: Removed the
+	  setXRange() and setYRange() methods. In our own code, we will use Bounds
+	  instead of JFreeChart's Range instances to save range/bounds information.
+	  This is necessary to save information which is not not from type double
+	  (which is the case in Timeseries charts).
+
+	* src/main/java/de/intevation/flys/exports/XYChartGenerator.java: Replaced
+	  usage of Range with Bounds in the whole class.
+
+	* src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java,
+	  src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java:
+	  Adapted the method signature of zoom() and zoomX().
+
 2012-03-14  Ingo Weinzierl <ingo@intevation.de>
 
 	* src/main/java/de/intevation/flys/exports/TimeseriesChartGenerator.java:

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java	Thu Mar 15 10:30:03 2012 +0000
@@ -53,6 +53,7 @@
 import de.intevation.flys.artifacts.FLYSArtifact;
 import de.intevation.flys.artifacts.resources.Resources;
 import de.intevation.flys.jfree.Bounds;
+import de.intevation.flys.jfree.DoubleBounds;
 import de.intevation.flys.jfree.EnhancedLineAndShapeRenderer;
 import de.intevation.flys.jfree.StableXYDifferenceRenderer;
 import de.intevation.flys.jfree.StyledAreaSeriesCollection;
@@ -178,25 +179,6 @@
 
     protected abstract Series getSeriesOf(XYDataset dataset, int idx);
 
-
-    /**
-     * This method is used to set the range of the X axis at index <i>axis</i>.
-     *
-     * @param axis The index of an X axis.
-     * @param range The new range for the X axis at index <i>axis</i>.
-     */
-    protected abstract void setXRange(int axis, Range range);
-
-
-    /**
-     * This method is used to set the range of the Y axis at index <i>axis</i>.
-     *
-     * @param axis The index of an Y axis.
-     * @param range The new range for the Y axis at index <i>axis</i>.
-     */
-    protected abstract void setYRange(int axis, Range range);
-
-
     /**
      * Returns the default title of a chart.
      *
@@ -240,7 +222,17 @@
      * @param idx The index of the X axis that should be comined with
      * <i>range</i>.
      */
-    protected abstract void combineXRanges(Range range, int idx);
+    protected abstract void combineXBounds(Bounds bounds, int idx);
+
+
+    /**
+     * Combines the ranges of the Y axis at index <i>idx</i>.
+     *
+     * @param range A new range.
+     * @param idx The index of the Y axis that should be comined with
+     * <i>range</i>.
+     */
+    protected abstract void combineYBounds(Bounds bounds, int index);
 
 
     /**
@@ -861,9 +853,9 @@
 
         AxisDataset axisDataset = getAxisDataset(idx);
 
-        Range[] xyRanges = ChartHelper.getRanges(dataset);
+        Bounds[] xyBounds = ChartHelper.getBounds(dataset);
 
-        if (xyRanges == null) {
+        if (xyBounds == null) {
             logger.warn("Skip XYDataset for Axis (invalid ranges): " + idx);
             return;
         }
@@ -871,21 +863,15 @@
         if (visible) {
             if (logger.isDebugEnabled()) {
                 logger.debug("Add new AxisDataset at index: " + idx);
-                logger.debug("X extent: " + xyRanges[0]);
-                logger.debug("Y extent: " + xyRanges[1]);
+                logger.debug("X extent: " + xyBounds[0]);
+                logger.debug("Y extent: " + xyBounds[1]);
             }
 
             axisDataset.addDataset(dataset);
-            combineXRanges(xyRanges[0], 0);
         }
-        else {
-            combineXRanges(xyRanges[0], 0);
 
-            // TODO
-            // Expand y range provided by 'timeseries' to have a proper range
-            // set which includes all data.
-            // iw: I am not sure if we still need this
-        }
+        combineXBounds(xyBounds[0], 0);
+        combineYBounds(xyBounds[1], idx);
     }
 
 
@@ -1129,7 +1115,7 @@
                         Range.expandToInclude(axisDataset.getRange(), 0d));
                 }
 
-                setYRange(axisIndex, expandPointRange(axisDataset.getRange()));
+                setYBounds(axisIndex, expandPointRange(axisDataset.getRange()));
 
                 // Add contained datasets, mapping to axis.
                 for (XYDataset dataset: axisDataset.getDatasets()) {
@@ -1280,11 +1266,19 @@
      *
      * @param Range to be expanded if upper == lower bound.
      */
-    private Range expandPointRange(Range range) {
-        if (range != null && range.getLowerBound() == range.getUpperBound()) {
-            return ChartHelper.expandRange(range, 5);
+    private Bounds expandPointRange(Range range) {
+        if (range == null) {
+            return null;
         }
-        return range;
+        else if (range.getLowerBound() == range.getUpperBound()) {
+            double hi  = range.getUpperBound();
+            double lo  = range.getLowerBound();
+            double add = (hi - lo) / 100 * 5;
+
+            return new DoubleBounds(lo-add, hi+add);
+        }
+
+        return new DoubleBounds(range.getLowerBound(), range.getUpperBound());
     }
 
 

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartHelper.java	Thu Mar 15 10:30:03 2012 +0000
@@ -2,6 +2,7 @@
 
 import org.jfree.data.Range;
 import org.jfree.data.xy.XYDataset;
+import org.jfree.data.xy.XYSeriesCollection;
 import org.jfree.data.time.RegularTimePeriod;
 import org.jfree.data.time.TimeSeriesCollection;
 import org.jfree.data.time.TimeSeries;
@@ -29,7 +30,7 @@
      *
      * @return an array with x and y ranges.
      */
-    public static Range[] getRanges(XYDataset dataset) {
+    public static Bounds[] getBounds(XYSeriesCollection dataset) {
         int seriesCount = dataset != null ? dataset.getSeriesCount() : 0;
 
         if (seriesCount == 0) {
@@ -75,11 +76,27 @@
         }
 
         return foundValue
-            ? new Range[] { new Range(minX, maxX), new Range(minY, maxY) }
+            ? new Bounds[] {
+                    new DoubleBounds(minX, maxX),
+                    new DoubleBounds(minY, maxY) }
             : null;
     }
 
 
+    public static Bounds[] getBounds(XYDataset dataset) {
+        if (dataset instanceof XYSeriesCollection) {
+            return getBounds((XYSeriesCollection) dataset);
+        }
+        else if(dataset instanceof TimeSeriesCollection) {
+            return getBounds((TimeSeriesCollection) dataset);
+        }
+        else {
+            logger.warn("Unknown XYDataset instance: " + dataset.getClass());
+            return null;
+        }
+    }
+
+
     public static Bounds[] getBounds(TimeSeriesCollection collection) {
         int seriesCount = collection != null ? collection.getSeriesCount() : 0;
 

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DischargeCurveGenerator.java	Thu Mar 15 10:30:03 2012 +0000
@@ -24,6 +24,7 @@
 import de.intevation.flys.artifacts.model.WQKms;
 
 import de.intevation.flys.utils.FLYSUtils;
+import de.intevation.flys.jfree.Bounds;
 import de.intevation.flys.jfree.FLYSAnnotation;
 import de.intevation.flys.jfree.StyledXYSeries;
 
@@ -115,8 +116,8 @@
 
     /* TODO is this one really needed? */
     @Override
-    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
-        boolean zoomin = super.zoom(plot, axis, range, x);
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
+        boolean zoomin = super.zoom(plot, axis, bounds, x);
 
         if (!zoomin) {
             axis.setLowerBound(0d);

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/DurationCurveGenerator.java	Thu Mar 15 10:30:03 2012 +0000
@@ -20,6 +20,7 @@
 import de.intevation.flys.artifacts.model.WQDay;
 import de.intevation.flys.artifacts.resources.Resources;
 
+import de.intevation.flys.jfree.Bounds;
 import de.intevation.flys.jfree.FLYSAnnotation;
 import de.intevation.flys.jfree.StyledXYSeries;
 
@@ -148,8 +149,8 @@
 
 
     @Override
-    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
-        boolean zoomin = super.zoom(plot, axis, range, x);
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
+        boolean zoomin = super.zoom(plot, axis, bounds, x);
 
         if (!zoomin) {
             axis.setLowerBound(0d);
@@ -167,8 +168,8 @@
      * values on its own.
      */
     @Override
-    protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
-        boolean zoomin = super.zoom(plot, axis, range, x);
+    protected boolean zoomY(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
+        boolean zoomin = super.zoom(plot, axis, bounds, x);
 
         if (!zoomin && axis instanceof IdentifiableNumberAxis) {
             String id = ((IdentifiableNumberAxis) axis).getId();

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/TimeseriesChartGenerator.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/TimeseriesChartGenerator.java	Thu Mar 15 10:30:03 2012 +0000
@@ -130,9 +130,9 @@
     public static final int AXIS_SPACE = 5;
 
 
-    protected Map<Integer, Bounds> xRanges;
+    protected Map<Integer, Bounds> xBounds;
 
-    protected Map<Integer, Bounds> yRanges;
+    protected Map<Integer, Bounds> yBounds;
 
 
 
@@ -142,8 +142,8 @@
     public TimeseriesChartGenerator() {
         super();
 
-        xRanges = new HashMap<Integer, Bounds>();
-        yRanges = new HashMap<Integer, Bounds>();
+        xBounds = new HashMap<Integer, Bounds>();
+        yBounds = new HashMap<Integer, Bounds>();
     }
 
 
@@ -183,34 +183,6 @@
     }
 
 
-    // TODO DECLARE IN UPPER CLASS AND ADD OVERRIDE ANNOTATION
-    protected Bounds getXRange(int axis) {
-        return xRanges.get(Integer.valueOf(axis));
-    }
-
-
-    @Override
-    // TODO setXRange should always await a Bounds instance!
-    // TODO SHOULD BE REMOVED WHEN DEFINED IN UPPER CLASS
-    protected void setXRange(int axis, Range range) {
-        // do nothing here, we will use setXRange(int, Bounds) now
-    }
-
-
-    @Override
-    // TODO setYRange should always await a Bounds instance!
-    protected void setYRange(int axis, Range range) {
-        if (range == null) {
-            logger.warn("Range is null!");
-            return;
-        }
-
-        setYBounds(Integer.valueOf(axis), new DoubleBounds(
-            range.getLowerBound(),
-            range.getUpperBound()));
-    }
-
-
     /**
      * This method creates new instances of TimeseriesAxisDataset.
      *
@@ -223,52 +195,10 @@
     }
 
 
-    // TODO THIS SHOULD BE DONE IN AN UPPER CLASS!
     @Override
-    public void addAxisDataset(XYDataset dataset, int idx, boolean visible) {
-        if (dataset == null || idx < 0) {
-            return;
-        }
-
-        AxisDataset axisDataset = getAxisDataset(idx);
-
-        Bounds[] bounds = ChartHelper.getBounds((TimeSeriesCollection)dataset);
-
-        if (bounds == null) {
-            logger.warn("Skip XYDataset for Axis (invalid ranges): " + idx);
-            return;
-        }
-
-        if (visible) {
-            if (logger.isDebugEnabled()) {
-                logger.debug("Add new AxisDataset at index: " + idx);
-                logger.debug("X extent: " + bounds[0]);
-                logger.debug("Y extent: " + bounds[1]);
-            }
-
-            axisDataset.addDataset(dataset);
-        }
-
-        combineXRanges(bounds[0], 0);
-        combineYRanges(bounds[1], idx);
-    }
-
-
-    /**
-     * Effect: extend range of x axis to include given limits.
-     * @param range the given ("minimal") range.
-     * @param index index of axis to be merged.
-     */
-    @Override
-    protected void combineXRanges(Range range, int index) {
-        throw new RuntimeException(
-            "TimeseriesChartGenerator.combineXRanges is not implemented!");
-    }
-
-
-    protected void combineXRanges(Bounds bounds, int index) {
+    protected void combineXBounds(Bounds bounds, int index) {
         if (bounds != null) {
-            Bounds old = getXRange(index);
+            Bounds old = getXBounds(index);
 
             if (old != null) {
                 bounds = bounds.combine(old);
@@ -279,7 +209,8 @@
     }
 
 
-    protected void combineYRanges(Bounds bounds, int index) {
+    @Override
+    protected void combineYBounds(Bounds bounds, int index) {
         if (bounds != null) {
             Bounds old = getYBounds(index);
 
@@ -311,25 +242,27 @@
 
     @Override
     public Bounds getXBounds(int axis) {
-        return xRanges.get(axis);
+        return xBounds.get(axis);
     }
 
 
     @Override
     protected void setXBounds(int axis, Bounds bounds) {
-        xRanges.put(axis, bounds);
+        xBounds.put(axis, bounds);
     }
 
 
     @Override
     public Bounds getYBounds(int axis) {
-        return yRanges.get(axis);
+        return yBounds.get(axis);
     }
 
 
     @Override
     protected void setYBounds(int axis, Bounds bounds) {
-        yRanges.put(axis, bounds);
+        if (bounds != null) {
+            yBounds.put(axis, bounds);
+        }
     }
 
 
@@ -415,7 +348,7 @@
     protected void adaptZoom(XYPlot plot) {
         logger.debug("Adapt zoom of Timeseries chart.");
 
-        zoomX(plot, plot.getDomainAxis(), getXRange(0), getDomainAxisRange());
+        zoomX(plot, plot.getDomainAxis(), getXBounds(0), getDomainAxisRange());
 
         Bounds valueAxisBounds = getValueAxisRange();
 

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Wed Mar 14 15:12:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/XYChartGenerator.java	Thu Mar 15 10:30:03 2012 +0000
@@ -42,6 +42,7 @@
 import de.intevation.artifactdatabase.state.Facet;
 
 import de.intevation.flys.jfree.Bounds;
+import de.intevation.flys.jfree.DoubleBounds;
 import de.intevation.flys.jfree.FLYSAnnotation;
 import de.intevation.flys.jfree.StickyAxisAnnotation;
 import de.intevation.flys.jfree.CollisionFreeXYTextAnnotation;
@@ -173,6 +174,8 @@
 
     protected abstract YAxisWalker getYAxisWalker();
 
+    public static final int AXIS_SPACE = 5;
+
     /** The logger that is used in this generator. */
     private static Logger logger = Logger.getLogger(XYChartGenerator.class);
 
@@ -180,17 +183,17 @@
     protected List<FLYSAnnotation> annotations;
 
     /** The max X range to include all X values of all series for each axis. */
-    protected Map<Integer, Range> xRanges;
+    protected Map<Integer, Bounds> xBounds;
 
     /** The max Y range to include all Y values of all series for each axis. */
-    protected Map<Integer, Range> yRanges;
+    protected Map<Integer, Bounds> yBounds;
 
 
     public XYChartGenerator() {
         super();
 
-        xRanges  = new HashMap<Integer, Range>();
-        yRanges  = new HashMap<Integer, Range>();
+        xBounds  = new HashMap<Integer, Bounds>();
+        yBounds  = new HashMap<Integer, Bounds>();
     }
 
 
@@ -247,18 +250,6 @@
 
 
     @Override
-    protected void setXRange(int axis, Range range) {
-        xRanges.put(Integer.valueOf(axis), range);
-    }
-
-
-    @Override
-    protected void setYRange(int axis, Range range) {
-        yRanges.put(Integer.valueOf(axis), range);
-    }
-
-
-    @Override
     protected AxisDataset createAxisDataset(int idx) {
         logger.debug("Create new XYAxisDataset for index: " + idx);
         return new XYAxisDataset(idx);
@@ -358,24 +349,57 @@
 
     /**
      * Effect: extend range of x axis to include given limits.
+     *
      * @param range the given ("minimal") range.
      * @param index index of axis to be merged.
      */
-    protected void combineXRanges(Range range, int index) {
-
-        if (range == null
-            || Double.isNaN(range.getLowerBound())
-            || Double.isNaN(range.getUpperBound())) {
+    @Override
+    protected void combineXBounds(Bounds bounds, int index) {
+        if (!(bounds instanceof DoubleBounds)) {
+            logger.warn("Unsupported Bounds type: " + bounds.getClass());
             return;
         }
 
-        Range old = xRanges.get(index);
+        DoubleBounds dBounds = (DoubleBounds) bounds;
+
+        if (dBounds == null
+            || Double.isNaN((Double) dBounds.getLower())
+            || Double.isNaN((Double) dBounds.getUpper())) {
+            return;
+        }
+
+        Bounds old = getXBounds(index);
 
         if (old != null) {
-            range = Range.combine(old, range);
+            dBounds = (DoubleBounds) dBounds.combine(old);
         }
 
-        xRanges.put(index, range);
+        setXBounds(index, dBounds);
+    }
+
+
+    @Override
+    protected void combineYBounds(Bounds bounds, int index) {
+        if (!(bounds instanceof DoubleBounds)) {
+            logger.warn("Unsupported Bounds type: " + bounds.getClass());
+            return;
+        }
+
+        DoubleBounds dBounds = (DoubleBounds) bounds;
+
+        if (dBounds == null
+            || Double.isNaN((Double) dBounds.getLower())
+            || Double.isNaN((Double) dBounds.getUpper())) {
+            return;
+        }
+
+        Bounds old = getYBounds(index);
+
+        if (old != null) {
+            dBounds = (DoubleBounds) dBounds.combine(old);
+        }
+
+        setYBounds(index, dBounds);
     }
 
 
@@ -412,11 +436,16 @@
     private void preparePointRanges(XYPlot plot) {
         for (int i = 0, num = plot.getDomainAxisCount(); i < num; i++) {
             logger.debug("Check whether to expand a x axis.");
-            Integer key = Integer.valueOf(i);
 
-            Range r = xRanges.get(key);
-            if (r != null && r.getLowerBound() == r.getUpperBound()) {
-                setXRange(key, ChartHelper.expandRange(r, 5));
+            Integer key = Integer.valueOf(i);
+            Bounds  b   = getXBounds(key);
+
+            if (b != null && b.getLower() == b.getUpper()) {
+                double lo  = (Double) b.getLower();
+                double hi  = (Double) b.getUpper();
+                double add = (hi - lo) / 100 * 5;
+
+                setXBounds(key, new DoubleBounds(lo-add, hi+add));
             }
         }
     }
@@ -444,7 +473,7 @@
             xAxis.setRange(fixedXRange);
         }
         else {
-            zoomX(plot, xAxis, xRanges.get(0), xrange);
+            zoomX(plot, xAxis, getXBounds(0), xrange);
         }
 
         for (int i = 0, num = plot.getRangeAxisCount(); i < num; i++) {
@@ -466,7 +495,7 @@
             }
 
             logger.debug("Prepare zoom settings for y axis at index: " + i);
-            zoomY(plot, yaxis, yRanges.get(Integer.valueOf(i)), yrange);
+            zoomY(plot, yaxis, getYBounds(Integer.valueOf(i)), yrange);
         }
     }
 
@@ -537,13 +566,13 @@
     }
 
 
-    protected boolean zoomX(XYPlot plot, ValueAxis axis, Range range, Range x) {
-        return zoom(plot, axis, range, x);
+    protected boolean zoomX(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
+        return zoom(plot, axis, bounds, x);
     }
 
 
-    protected boolean zoomY(XYPlot plot, ValueAxis axis, Range range, Range x) {
-        return zoom(plot, axis, range, x);
+    protected boolean zoomY(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
+        return zoom(plot, axis, bounds, x);
     }
 
 
@@ -557,29 +586,37 @@
      *
      * @return true, if a zoom range was specified, otherwise false.
      */
-    protected boolean zoom(XYPlot plot, ValueAxis axis, Range range, Range x) {
+    protected boolean zoom(XYPlot plot, ValueAxis axis, Bounds bounds, Range x) {
 
-        if (range == null) {
+        if (bounds == null) {
             return false;
         }
 
         if (x != null) {
-            double min  = range.getLowerBound();
-            double max  = range.getUpperBound();
+            double min  = bounds.getLower().doubleValue();
+            double max  = bounds.getUpper().doubleValue();
+
+            if (logger.isDebugEnabled()) {
+                logger.debug("Minimum is: " + min);
+                logger.debug("Maximum is: " + max);
+                logger.debug("Lower zoom is: " + x.getLowerBound());
+                logger.debug("Upper zoom is: " + x.getUpperBound());
+            }
+
             double diff = max > min ? max - min : min - max;
 
-            Range computed = new Range(
+            DoubleBounds computed = new DoubleBounds(
                 min + x.getLowerBound() * diff,
                 min + x.getUpperBound() * diff);
 
-            axis.setRangeWithMargins(computed);
+            computed.applyBounds(axis, AXIS_SPACE);
 
             logger.debug("Zoom axis to: " + computed);
 
             return true;
         }
 
-        axis.setRangeWithMargins(range);
+        bounds.applyBounds(axis, AXIS_SPACE);
         return false;
     }
 
@@ -596,52 +633,48 @@
     public Range[] getRangesForAxis(int index) {
         logger.debug("getRangesForAxis " + index);
 
-        Range rx = xRanges.get(Integer.valueOf(0));
-        Range ry = yRanges.get(Integer.valueOf(index));
+        Bounds rx = getXBounds(Integer.valueOf(0));
+        Bounds ry = getYBounds(Integer.valueOf(index));
 
         if (rx == null) {
             logger.warn("Range for x axis not set." +
                         " Using default values: 0 - 1.");
-            rx = new Range(0, 1);
+            rx = new DoubleBounds(0, 1);
         }
         if (ry == null) {
             logger.warn("Range for y" + index +
                         " axis not set. Using default values: 0 - 1.");
-            ry = new Range(0, 1);
+            ry = new DoubleBounds(0, 1);
         }
-        return new Range[] {rx, ry};
+
+        return new Range[] {
+            new Range(rx.getLower().doubleValue(), rx.getUpper().doubleValue()),
+            new Range(ry.getLower().doubleValue(), ry.getUpper().doubleValue())
+        };
     }
 
 
     @Override
     public Bounds getXBounds(int axis) {
-        // TODO IMPLEMENT ME
-        throw new RuntimeException(
-            "XYChartGenerator.getXBounds(int) not implemented");
+        return xBounds.get(axis);
     }
 
 
     @Override
     protected void setXBounds(int axis, Bounds bounds) {
-        // TODO IMPLEMENT ME
-        throw new RuntimeException(
-            "XYChartGenerator.setXBounds(int,Bounds) not implemented");
+        xBounds.put(axis, bounds);
     }
 
 
     @Override
     public Bounds getYBounds(int axis) {
-        // TODO IMPLEMENT ME
-        throw new RuntimeException(
-            "XYChartGenerator.getYBounds(int) not implemented");
+        return yBounds.get(axis);
     }
 
 
     @Override
     protected void setYBounds(int axis, Bounds bounds) {
-        // TODO IMPLEMENT ME
-        throw new RuntimeException(
-            "XYChartGenerator.setYBounds(int,Bounds) not implemented");
+        yBounds.put(axis, bounds);
     }